Climate and monthly weather forecastGrafton, WI
Climate and monthly weather forecast
Weather in January
January, the same as December, in Grafton, Wisconsin, is a freezing cold winter month, with temperature in the range of an average low of 15.8°F (-9°C) and an average high of 25.5°F (-3.6°C). With average temperatures fluctuating between a high of 25.5°F (-3.6°C) and a low of 15.8°F (-9°C), January stands out as the coldest month. Weather in January »Weather in February
February, the last month of the winter in Grafton, is also a subzero cold month, with an average temperature varying between 18°F (-7.8°C) and 28.2°F (-2.1°C). Grafton's shift from January to February is accompanied by an average high-temperature of a still freezing cold 28.2°F (-2.1°C), a slight deviation from 25.5°F (-3.6°C). Weather in February »Weather in March
The first month of the spring, March, is an icy month in Grafton, Wisconsin, with temperature in the range of an average high of 38.5°F (3.6°C) and an average low of 28°F (-2.2°C). March's onset is marked by a temperature increase, moving from a freezing cold 28.2°F (-2.1°C) in February to an icy 38.5°F (3.6°C). Weather in March »Weather in April
April is a chilly spring month in Grafton, Wisconsin, with an average temperature ranging between max 48.6°F (9.2°C) and min 36.9°F (2.7°C). Grafton sees an increase in the average high-temperature with the arrival of April, moving from March's icy 38.5°F (3.6°C) to a chilly 48.6°F (9.2°C). Weather in April »Weather in May
The last month of the spring, May, is a moderate month in Grafton, Wisconsin, with an average temperature ranging between max 59.5°F (15.3°C) and min 46.8°F (8.2°C). May's onset witnesses a shift in the average high-temperature, moving from a frosty 48.6°F (9.2°C) in April to a refreshing 59.5°F (15.3°C). Weather in May »Weather in June
The first month of the summer, June, is an agreeable month in Grafton, Wisconsin, with an average temperature ranging between max 68.7°F (20.4°C) and min 55.8°F (13.2°C). In Grafton, stepping into June brings a temperature increase, moving up from May's mild 59.5°F (15.3°C) to a pleasant 68.7°F (20.4°C). Weather in June »Weather in July
July is a moderately hot summer month in Grafton, Wisconsin, with temperature in the range of an average low of 63.1°F (17.3°C) and an average high of 76.1°F (24.5°C). In Grafton, the month of July is known for its highest average temperatures, reaching a high of 76.1°F (24.5°C) and a low of 63.1°F (17.3°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Grafton, Wisconsin, with an average temperature ranging between min 62.4°F (16.9°C) and max 75.4°F (24.1°C). Grafton records an average high-temperature of a still moderately hot 75.4°F (24.1°C) in August, closely mirroring the climate of the previous month. Weather in August »Weather in September
September, the first month of the autumn in Grafton, is also an agreeable month, with an average temperature fluctuating between 68.9°F (20.5°C) and 55.9°F (13.3°C). With the arrival of September, Grafton experiences a modest decline in average high-temperatures, transitioning from a moderately hot 75.4°F (24.1°C) in August to a pleasant 68.9°F (20.5°C). Weather in September »Weather in October
October, the same as September, in Grafton, Wisconsin, is another mild autumn month, with an average temperature fluctuating between 56.7°F (13.7°C) and 44.8°F (7.1°C). As September transitions to October, the average high-temperature falls from a pleasant 68.9°F (20.5°C) to a mild 56.7°F (13.7°C). Weather in October »Weather in November
November, the last month of the autumn in Grafton, is also a frosty month, with an average temperature ranging between max 43°F (6.1°C) and min 32.9°F (0.5°C). Grafton's average high-temperature decreases in November, falling from a moderate 56.7°F (13.7°C) in October to a chilly 43°F (6.1°C). Weather in November »Weather in December
December, the first month of the winter in Grafton, is still a freezing cold month, with an average temperature varying between 31.5°F (-0.3°C) and 23.7°F (-4.6°C). Onset of December comes with a temperature decline, the average high falling from a chilly 43°F (6.1°C) in November to a freezing cold 31.5°F (-0.3°C). Weather in December »Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Grafton's coldest temperatures are experienced in January, with average high temperatures of 25.5°F (-3.6°C) and lows of 15.8°F (-9°C).
The most humid month is January, with an average relative humidity of 86%.
Throughout the year, there are 134.9 rainfall days, and 23.94" (608mm) of precipitation is accumulated.
January through April, October through December are months with snowfall in Grafton.
January is the month with the most snowfall. Snow falls for 12.8 days and accumulates 3.43" (87mm) of snow.
In Grafton, during the entire year, snow falls for 51.1 days and aggregates up to 13.66" (347mm) of snow.
The month with the least sunshine in Grafton is January, with an average of 3.6h of sunshine.
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1.
The month with the least rainfall is February, when the rain falls for 3.8 days and typically collects 0.98" (25mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Grafton, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
April, October and November, with an average relative humidity of 77%, are the least humid months.
In Grafton, snow does not fall in May through September.
With an average of 15h and 18min of daylight, June has the longest days of the year.
July, characterized by an average high temperature of 76.1°F (24.5°C) and a low temperature of 63.1°F (17.3°C), is generally the warmest month in Grafton, Wisconsin.
July is the month with the most rainfall. Rain falls for 15.7 days and accumulates 2.99" (76mm) of precipitation.
The months with the most sunshine are July and August, with an average of 10.4h of sunshine.
With an average maximum UV index of 6, July is the month with the highest UV index.
December has the shortest days of the year, with an average of 9h and 0min of daylight.
Average temperature
Grafton, WI
The warmest month (with the highest average high temperature) is July (76.1°F).
The month with the lowest average high temperature is January (25.5°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure
Grafton, WI
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.08"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Grafton, WI
- Average wind speed in January:
12.1mph - Average wind speed in February:
11.7mph - Average wind speed in March:
10.7mph - Average wind speed in April:
10.9mph - Average wind speed in May:
9.2mph - Average wind speed in June:
8.1mph
- Average wind speed in July:
7.5mph - Average wind speed in August:
7.6mph - Average wind speed in September:
8.9mph - Average wind speed in October:
10.6mph - Average wind speed in November:
11.2mph - Average wind speed in December:
11.4mph
The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity
Grafton, WI
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April, October and November (77%).
Average rainfall
Grafton, WI
- Average rainfall in January:
1.18" - Average rainfall in February:
0.98" - Average rainfall in March:
1.38" - Average rainfall in April:
2.52" - Average rainfall in May:
2.76" - Average rainfall in June:
2.87"
The wettest month (with the highest rainfall) is July (2.99").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days
Grafton, WI
- Average rainfall days in January:
4.4 days - Average rainfall days in February:
3.8 days - Average rainfall days in March:
9.4 days - Average rainfall days in April:
14.6 days - Average rainfall days in May:
15.8 days - Average rainfall days in June:
15.7 days
- Average rainfall days in July:
15.7 days - Average rainfall days in August:
15.2 days - Average rainfall days in September:
12.9 days - Average rainfall days in October:
13.1 days - Average rainfall days in November:
8.6 days - Average rainfall days in December:
5.7 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is February (3.8 days).
Average snowfall
Grafton, WI
The month with the highest snowfall is January (3.43").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Grafton, WI
- Average snowfall days in January:
12.8 days - Average snowfall days in February:
11.7 days - Average snowfall days in March:
7.5 days - Average snowfall days in April:
2.2 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.7 days - Average snowfall days in November:
5.2 days - Average snowfall days in December:
10.9 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Grafton, WI
- Average daylight in January:
9h and 24min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 18min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
3h and 36min - Average sunshine in February:
3h and 48min - Average sunshine in March:
5h and 54min - Average sunshine in April:
7h and 24min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 24min - Average sunshine in September:
9h and 6min - Average sunshine in October:
5h and 24min - Average sunshine in November:
4h and 54min - Average sunshine in December:
3h and 54min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Grafton, WI
- Average sunshine days in January:
13.3 days - Average sunshine days in February:
12.5 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
12.2 days - Average sunshine days in May:
12.9 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
11.6 days - Average sunshine days in August:
12.6 days - Average sunshine days in September:
15.1 days - Average sunshine days in October:
13.9 days - Average sunshine days in November:
16.1 days - Average sunshine days in December:
16.4 days
The month with the most sunshine days is December (16.4 days).
The month with the least sunshine days is July (11.6 days).
Average UV index
Grafton, WI
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover
Grafton, WI
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility
Grafton, WI
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
